Safety draw-bab



E. J. BREWSTER AND 1. MURRIN.

SAFETY DRAW BAR.

APPLICATION F ILED JUNE 7. 1920- 1,360,877. Patented Nov. 30, 1920.

3 SHEETS-SHEET I. W

i i HWIEWW 1 I AM m J0 Nurrin E. J. BREWSTER AND J. MURRIN.

SAFETY DRAW BAR.

APPLICATION FILED JUNE 7. 1920;

Patented Nov. 30, 1920.

3 SHEETS-SHEET 2- "BZQMQ n 1 J M fiW Q W l IQl l l l HU dj I I l l I IIk ZdZiness E. J. BREWSTER AND J. MURRIN.

SAFETY DRAW BAR.

APPLICATION FILED JUNE 7, 1920.

Patented Nov; 30, 1920.

* 3 SHEETSSHEET 3 fzr'iiiwess 97W fumes STATES PATENT OFFICE.

ELiaEn JfB RE-WSTER AND JOHN MURRIN, or CHICAGO, ILLINOIS.

SAFETY DRAW-BAR.

To all whom it may; concern Be it known that we, ELMER J. Bnnwsrnn andJOHN MURRIN, citizens of the United States, residing at Chicago, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in 1 Safety Draw-Bars, of which the following is aspecification. 1 I

The invention relates to means for detachably connecting alocomotiveengine and a tender, of a type in which a pair of super-imposed bars,consisting of a main draw bar and a safety or supplemental draw bar,

7 are employed in such a manner that the said connection is normallyeffected and maintained by the main] draw bar, and in the event of thebreakage or impairment of said bar, disconnection of the locomotive 1ends for the reception of draw bar pins suitably supported incastingshaving longitudinally extended pockets for the end portions of the drawbars, g

This. old style ,or type of construction is faulty and objectionable,for the reason the draw. bars are necessarily weakened by the eyes oropenings therein, and to .prevent breakage thereof at their thusweakened parts, as well as breakage, of the saidpins, it is necessary toreinforce the draw bars and to make the pins ofsuch size as. to bebothbars and pins, heavy, cumbersome and difficult to handle or use in thecircumscribed or narrow confines of thepockets of the castings.

To overcome thisdefect and objection by furnishing a safety draw bar orconnectionof the class above named, in whlch no eyes or openings in thebars 'to weaken them, are employed, but onthe other hand, the same arestrengthened at the points where they have heretofore been weak, andtodispense with the draw bar pins, above mentioned, is one of theobjects of our in vention.

Another object is to furnish a draw bar Specification of Letters Patent.

Application filed June 7, 1929. Serial No. 387,045.

Patented Nov. 30, 1920.

of such construction and operation of its parts as to equalize theirmovements, thereby maintaining the same distance or relation between thechafing irons on the tender and engine on any curve or side movement,and besides in rounding curves in the track. will automatically moveinwardly of the curve and thus reduce or eliminate the excessive sidepull on the wheel flanges of the tender and engine. 7

Other objects and advantages of the in vention will be disclosed in thefollowing description and explanation.

The invention consists in certain peculiarities of the construction,novel arrangement and operation of the various parts thereof as will behereinafter more fully set forth and specifically claimed.

In the accompanying drawings, which serve to illustrate the inventionFigure l is a plan view, partly in horizontal section of the middleportion of the adjoining ends of a locomotive and its tenderillustrating an application of one form of the invention. 7

Fig. 2 is a view in side elevation thereof.

Fig. 3 is a vertical longitudinal central section taken on line 8-3 ofFig/1 looking in the direction indicated by the arrows. Fig. 4 is a planview partly in section of the pocketed casting or foot plate of thelocomotive showing a modification in the means for connecting the drawbars thereto. Fig. 5 is a crosssectional view taken on line 55 of Fig. 4looking in the direction indicated by the arrows, and V Fig. 6 is asimilar view taken on line 66 of Fig.1 as indicated by the arrows.

v Like numerals of reference designate cor responding parts throughoutthe different views of the drawings.

7 Referring now more particularly to Figs. 1 to 3 inclusive and Fig. 6of the drawings, the reference numeral 10 designates as a whole the drawbar receiving casting or member which is mounted on the rear portion ofthe locomotive and may be of any suitable size, formand constructionexternally but is, provided with a, horizontally disposed pocket 11 therear end of which terminates in a flared opening 12 located below thechafing irons 13 and 14 of the casting or member 10 and the draw head 15of the draw bar receiving casting or member of the tender, which isindicated as a whole by the reference numeral 16. The chafing irons 13and 14 may have interposed therebetween a floating block 17 adjusted bymeans of a wedge 18 of the ordinary construction and in the well knownway, but of course it will be understood that the above mentionedelements form no part of our invention.

As is clearly shown in Fig. 1 the casting or member 10 is provided ateach side of the pocket 11 therein and inwardly of the flaring opening12 with an inward extension 19 which extends from the bottom or floor 19to the top 20 of the pocket 11 and each of said extensions has in itsinner surface an arcuate recess 21 for the reception and operation ofthe outer ends of'a pair of dogs 22 each of which has its end adjacentthe recess 21 with which it co-acts rounded as shown.

The floor of the pocket 11 of the casting 10 is provided inwardly of theextensions 19 with a transversely disposed slot 23 through which arevertically extended pins or projections 24 one of which is located onthe inner end of each of the dogs 22 as will be readily understood byreference to Fig. 6 of the drawings. The pins 24 are connected togetherby means of a link 25- located thereon within the slot 23 and preferablyheld in place by means of pins 26 extended through suitable openings inthe projections 24 below said link.

The casting or member 16 of the tender may be made of any suitable size,form and material, but as shown, is provided with a horizontallydisposed pocket 27 terminating at its end adjacent the casting 10 withan opening 28 in register or alinement with the opening 12 of the pocket11 in the casting or member 10 of the locomotive. The casting or member16 is shown as being rigidly mounted on the front end sill 29 of thetender and has on each of the side walls of its pocket 27 near the mouthor opening 28 thereof an inward extension 30 each of which is providedwith an arcuate recess 31 for the reception and operation of a dog 22 ofthe same construction and arrangement of its parts as that employed inthe casting or member 10 and above described.

The casting or member 16 is provided in the floor 32 of the pocket 27with a transversely disposed slot 33 for the reception of the link 25which unites the pins or projections 24 on said dogs. 7

Mounted on the floors 19 and 32 of the castings or members 10 and 16respectively is a main draw bar 34 which has longitudinally mounted onits upper surface another or auxiliary draw bar 35 which are of the sameconstruction but of slightly differ ent dimensions, that is, the maindraw bar.

34 is by preference shorter than the draw bar 35 as will be readilyunderstood by reference to Figs. 1 and 3 of the drawings. Each of thesedraw bars is provided at each of its ends with a head 36 somewhatv widerthan the main or body portion of the bar. Each of these heads isprovided with a rounded or arcuate recess 37 on each side of the main orbody portion of the bar for the reception and c0-action with the ends ofthe dogs 22 which carry the depending pins 24. It will be understoodthat the recesses 37 on each of the heads 36 of the auxiliary draw bar35 are located longitudinally at a greater distance apart than therecesses 37 on the main draw bar 34, and consequently, the main draw bar34 will, after the draw bars have been placed in proper position withinthe pockets of the castings with respect to the dogs 22, sustain thestress or strain while the auxiliary draw bar will be without suchstress or strain, yet in position to assume the same should the maindraw bar become broken or impaired.

From the above described construction and arrangement of the parts itwill be understood that a rolling action between the dogs 22 and theirhearings or the recesses in the heads of the draw bars and in theextensions 19 and 30 of the castings 10 and 16 respectively, with whichsaid dogs co-act,

will be produced and that in the movement I of the vehicles on a curvedtrack, the parts will automatically move toward the inside line of thecurve and will thus eliminate the excessive side pull on the wheelflanges of the tender and engine, besides, it will be understood that anequalizing draw bar connection will be afforded which willkeep thechafing irons on the tender and engine in the same relative position onany curve or side movement.

While we have shown the auxiliary or safety draw bar as being locatedabove or on top of the main draw bar 34, yet it will be understood thatthis arrangement is not essential as their positions may be reversed andthe same function attained. As shown, the dogs 22 are of sufficientdimensionsto extend from the floors of the castings or members 10 and 16slightly above the upper surface of the uppermost draw bar and that asthe strain on said dogs will be presented longitudinally thereto thatgreat strength and durability will be afforded. Furthermore, it isapparent that as these dogs are provided on their lower surfaces at oneof 7 shown a modification in the construction of l and 16 are of thesame construction as shown in Figs. 1 to 3 inclusive and abovedescribed, except that the floors 19 'andy32 and the tops of the'pockets11 and 27 of the castings or members 10'and 16 respectively are providedwith vertical openings 38 located near the recesses 21 and 31 of themembers 10 and 16 respectively but between said recesses and the slots25 in the bottoms of said castings or members for the reception of pivotpins 39 which are extended vertically through suitable openings in dogsnear their rounded ends which co-act with said recesses. These dogs inthe modified construction are substantially the same shape as the dogs22 above described, and are connected together at their ends adjacentthe heads 36 of the draw bars by means of depending projections 24 andlinks 25 uniting the same in a similar manner to that above describedwith reference to the dogs of the first described construction. Thepivot pins 39 are prevented from displacement downwardly through theopenings 38 in which they are located by means of a keeper bar 40 onwhich they rest at their lower ends and which bar is bolted to brackets41 depending from the bottom or fioor of the casting or member on whichthey are mounted.

While we have shown thedevice as employing a main draw bar and anauxiliary or safety draw bar, and will generally use the same, yet wedesire it to be understood 7 that one of said draw bars may be omitted,

if desired, without departing from the spirit of the invention.

' Having thus fully described our invention, what we claim as new anddesire to secure by Letters Patent is -1. In a device of the classdescribed, the

. combination with a pocketed draw bar receiving casting or nembermounted on a railroad vehicle and having in each of the side walls ofits pocket near one end thereof an arcuate recess, of a dog located atone of its ends in each ofsaid recesses and coacting therewith and eachhaving near its other end a projection, a link loosely uniting saidprojections, and a draw bar having a head wider than its body andprovided at its juncture with said body and on each side thereof with arecess for the reception of and co-action with the ends of the dogsadjacent said projections.

2. In a device of the class described, the

combination with a pocketed draw bar receiving casting or member mountedon a railr ad vehicle and having in each of the side walls of its pocketnear one end thereof an arcuate recess, of another pocketed draw barreceiving casting or member mounted on a railroad vehicle adapted to becoupled to the first named vehicle, the last named casting or memberhaving in each of the side walls of its pocket near one end thereofarcuate recess, of a dog located at one of .each of said dogs havingnear its other end .a pro ection, a link loosely unitlng saidprojections transversely with respect to the dogs, and a draw bar havingat each of its ends a head wider than its intervening body, each of saidheads provided at its juncture with said body and on each side thereofwith a recess for the reception of and coaction with the ends of thedogs adjacent said projections.

3. In a device of the class described, the combination with a pocketeddraw bar receiving casting or member adapted to be mounted on a railroadvehicle and having in each of the side walls of its pocket near one endthereof an arcuate recess, of another pocketed draw bar receivingcasting or member adapted to be mounted on another railroad vehicle tobe coupled to the first named vehicle, the last named casting or memberhaving in each of the side walls of its pocket near one end thereof anarouate recess, of a dog located at one of its ends in each of saidrecesses of each casting or member and co-acting therewith, each of saiddogs having near its other end a depending projection, a link looselyuniting said projections transversely with respect to the dogs forholding the ends of said dogs at a distance apart than their other ends,and a main and safety or auxiliary draw bar superimposed one on theother and each having at each of its ends a head wider than itsintervening body portion, each of said heads provided at its juncture'with said body portion and on each side thereof with a recess for thereception of and co-action with the ends of the dogs adjacent saidprojections, the said recesses in the heads of the safety or auxiliarydraw bar being longitudinally spaced at a greater distance than therecesses in the heads of the main draw bar.

4. In a device of the class described, the combination with a pocketeddraw bar receiving casting or member mounted on a railroad vehicle andhaving in each of the side walls of its pocket near one end thereof anarcuate recess, of a dog located at one of its ends in each of saidrecesses and co acting therewith and each having near its other end aprojection, a link loosely uniting said projections, and a draw barhaving a head wider than its body with no eyes or holes therein for pinsand provided at the juncture of said body and on each side thereof witha recess for the reception of and coaction with the ends of the dogsadjacent said projections.

5. In a device of the class described, the

. its ends in each of said recesses and coacting therewith and eachhaving near its other end a projection, a link loosely unit j ections.

ing' said projections, and a draw bar having" In each of its sides nearone end thereof a recess for the reception of and co-actlon with theends of the dog's adjacent said 'pro- ELMER J. BREWSTER.

JOHN IVIURRIN.

